Double telescope with support.



No. 873,105. PATENTED DEC. 10, 1907.

v R. STRAUBEL.

DOUBLE TELESCOPE WITH SUPPORT APPLIOAT'ION'FILED 1151.25, 1907.

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No. 873,105. v PATENTED DEC. 10, 1907.

R. STRAUBBL.

DOUBLE TELESCOPE WITH SUPPORT APPLIUATION FILED JAN. 25, 1907.

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UNITED STATES PATENT OFFICE.

RUDOLF STRAUBEL, OF JENA, GERMANY, ASSIGNOR TO THE FIRM OF CARL ZEISS, OF JENA,

GERMANY.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed January 25, 1907. Serial No- 353.981.

To all whom it may concern:

Be it known that I, Professor RUDOLF STRAUBEL, doctor of philosophy, .a citizen of the German Empire, and residing at Carl- Zeissstrasse, Jena, in the Grand Duchy of Saxe-Weimar, Germany, have invented a new and useful Double Telescope with Supports, of which the following is a specification.

The invention consists in an imroved connection of the larger hinged doub e telescopes with their supports, under which term is to be understood a handle, the head of a stand and the like, without prejudice as to whether this support be permanently fixed to the telescope or not. The connection hitherto employed between the two consisted in the hinge-bolt ofthe double telescope being clutched with more or less friction in a bearing of the support. Since in hinged double telescopes without exception the adaptation of the distance between the oculars to the inter-pupillary distance of each observer has to be effected by enlarging or diminishing the angle which the single telescopes make with one another, and further since the double telescope has to sit symmetrically upon its support for convenient use,

' in order that in the vertical position of the support both oculars lie at the same level, it follows, that in altering the distance between the oculars even in the most favorable constructionthat is, when neither single telescope is rigidly connected with the hingeboltcare and dexterity are requisite to effect the alteration, so that the new position of the double telescope is once more a symmetrical one.

Through the present invention the user of a hinged double telescope having a support, is absolved from the necessity of paying attention to the symmetrical trim of the instrument relative to its support. This is accomplished by the two single telescopes being guided symmetrically upon the support, so that, during the adaptation of the distance between the ocularsto the interpupillary distance, the plane of the axes of the oculars undergoes vertical displacement merely, but no rotation. Such symmetrical guiding of'the single telescopes relatively to the support is, in general, independent of the means adapted to secure the angle as adjusted between the single telescopes, whether merely friction of the joint sufficient for the purpose or a special mechanical arrangement be used as such means.

In some cases, it may be expedient to form the device for the symmetrical guiding of the single telescopes relatively to the support also as an operating contrivance, by means of which the diminishing or enlarging of the angle between the single telescopes is eflected. The operating contrivance can in that case be developed, so'that, at the same time, it secures the angle as adjusted.

If the guiding device be coupled with a spring instead of developing it as an operating contrivance then the alteration of the angle between the single telescopes has to be again proceeded with by rotating these telescopes by hand; the spring can, however, of itself alone or in cooperation with the resistance offered by friction, for instance, the friction of the hinge, serve the purpose of securing the angle as adjusted. The spring can be easily arranged, sothat its tension grows, as the tendency of the single telescopes to rotate about their common hinge increases, and, inversely, so that the spring tension becomes less, as the moment of the weight of each single telescope decreases.

In the annexed drawings: Figure 1 is the front view of a hinged double telescope and its support, the two single telescopes being guided upon and symmetrically to the support. Fig. 2 is a section along line 22 in Fig. 1, shown on an enlarged scale. Fig. 3 is the front View of a similar combination. Fig. 4 is a section along line 44 in Fig. 3, shown on an enlarged scale. Fig. 5 is the front view of a third combination of the same kind. Fig. 6 is a section along line 66 inFig. 5, shown on an enlarged scale. Fig. 7 is the front view of a fourth combination of this kind. Fig. 8 is a section along line 88 in Fig. 7, shown on an enlarged scale. Fig. 9 is the front view-of a hinged double telescope and its support, a contrivance for altering the angle between the two single telescopes guiding also these telescopes upon, and symmetrically to, the support. Fig. 10 is a section along line 1010 in Fig. 9, shown on an enlarged scale. Fig. 11 is the front view of a similar combination. Fig. 12 is a section along line 12-12 in Fig. 11, shown on an enlarged scale. Fig. 13 is the front view of a third combination of this kind. Fig. 14 is the front view of a hinged double telescope and its support, a balance spring being connected with a device which guides the two single telescopes upon, and symmetrically to, the support. I Fig. 15 is the plan view of the middle part of a similar combination. Fig. 16 is a sectional front view corresponding to the plan view shown in Fig. 15.

In the arrangement according to Figs. 1

and 2 a handle a serves as support for the double telescope, provides rests for the single telescopes. by means of its two plates a a and guides the stud b arranged at the end of the hinge-bolt b by means of its slotted standard a". In order to be able to detach the handle easily from the hinged double telescope, the slot in the standard a at the lower end is made somewhat larger than the diameter of the head of the stud b".

The support in the arrangement according to Figs. 3 and 4 is not detachable. It con sists principally of a hub ccarried by the hinge-bolt b-which is carried downwards to form a pivot d for insertion into a stand or the like, and upward into a guiding rod 0. The sleeve e, guided upon this rod, isconnected up by means of the links e 6 with the single telescopes.

The instrument shown in Figs. 5 and 6 is adapted to be detachable from the head f of a stand, which is here also equippedwith a pivot (Z. The head f carries the supporting arms f, f provided with rollers and serves to guide the upright arm g of an angle piece, on the horizontal arm 9 of which the instrument with its hollow hinge-bolt his pushed.

The arrangement according to Figs. 7 and 8 shows the instrument likewise detachable from the support, which is again represented as a stand head i with a pivot d. Its slotted standard i open at the top serves to guide the sleeve 7c of the hinge-bolt 7c. Upon the arms i 01 of the stand head the single telesco e rests with rollers Z Z 11 the arrangement according to Figs. 9 and 10 the instrument proper is detachable from the stand head m. The arms m m of the stand head are fixed hingewise to the stand head, and are altered by the aid of the right hand and left hand screws W, n by means of its common nut n. The free ends of the arms form four forked rests, in which the double telescope is laid with the'pivots 0 0 i The double telescope according to Figs. 11 and 12 is also detachable from the support.

The stand head p receives the head and neck of the screw g in its slit p open at one side, said screw being provided with a hand wheel and gearing into the nut g revoluble upon the hinge-bolt 5. upon the plates 19 p of the stand head.

The arrangement according to Fig. 13 shows the double telescope again undetachable from the stand he ad 1" in that this is pivoted upon the hinge-bolt b. The stand head serves as nut for a screw 8 provided with hand wheel, the said screw assing by means of a stud 8 through a tensi e cord 25 t which connects the single telescopes.

The instrument Fig. 14 is permanently connected with the support and differs from the double telescope, Figs. 3 and 4, principally through the intervention of a pressure spring at between the stand head a and the sleeve 6.

The arrangement according to Figs. 15 and 16 is represented not only on a larger scale than the former exam les (the single telescopes being broken ofl short), but it relates also to a hinged double telescope deviating from the former in as far as on account of another position of the hinge the single telescopes are no longer inclined upward, but directed almost'horizontally, in particular with the adjustment for the average inter-pupillary distance as represented stretched out in a straight line. The instrument does not permit of being detached from the support, the stand head '0 again surrounding the hinge-bolt b. At the stand head, the outer end of a spiral spring to is attached, the inner end of which is fastened to the hub of a double lever 00 pivoted on the head 1). Upon this double lever and through that upon the s iral spring the moments of the weights of t 1e single telescopes act by means of the pins g If the instrument be collapsed, a stop if on the head i; prevents the spiral spring to turning the double lever 00 out of the paths of the pins if, (1,1

It will be understood, that in the combinations shown in Figs. 1 to 8 and 14 to. 16 alteration of the angle between the single telescopes is efl'ected by rotating at least one of these telescopes by hand. As to Figs. 14 to 16, the balance spring may either alone or in combination with a suitable friction of the hinge secure the angle between the single telescopes; whereas in Figs. 9 to 13 the contrivance for altering that angle secures it also, and in Figs. 1 to 8 the'friction of the hinge serves alone to secure the angle, but of course such friction might be assisted or substituted by a special securing device.

I claim:

1. The combination with two single teleand a guide for keeping the telescopes symmetrical to the support.

scopes hinged together of'a support therefor The single telescopes rest 7 2. The combination with two single telesymmetrical to the support and a balancing scopes hinged together of a su port therefor spring connected with the guiding means. and means for rotating the te escopes about the hinge symmetrically to the support. RUDOLF STRAUBEL' 3. The combination with two single tele- Witnesses: scopes hinged together of a sup ort therefor, PAUL KRI'irGER,

guiding means for keeping t e telescopes FRITZ SANDER. 

